Date: Thu, 2 Mar 2000 09:38:39 +0100 From: Brad Knowles <blk@skynet.be> To: Greg Lehey <grog@lemis.com>, FreeBSD Chat <chat@FreeBSD.ORG> Subject: Re: M$ one-ups UNIX??? Message-ID: <v04220802b4e3d8458c44@[195.238.1.121]> In-Reply-To: <20000302100710.G2905@freebie.lemis.com> References: <20000302100710.G2905@freebie.lemis.com>
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At 10:07 AM +1030 2000/3/2, Greg Lehey wrote: > Just saw this on a NetBSD list. It looks like a good idea. We should > make sure that they don't implement it before we do. So, you have to make sure you have an SHA-1 hash of every file on the system, and every time you go to create a new file, you have to check the SHA-1 hash and compare it against the database, and if you get a collision then you do a binary check to see if they really are the same file. If so, then you put in a soft link or a hard link to the location of the original. But what about permissions and ownership? What if there is a single .cshrc file that exists for the whole system, but then one user decides to go edit theirs -- do we now have to implement copy-on-write for files, and then re-coalesce after the files have been written? It strikes me that this idea opens up a whole lot of issues for general purpose files that I'm not sure we want to even start thinking about right now.... -- These are my opinions and should not be taken as official Skynet policy ========================================================================= Brad Knowles, <blk@skynet.be> Sys. Arch., Mail/News/FTP/Proxy Admin Note: No Microsoft programs were used in the creation or distribution of this message. If you are using a Microsoft program to view this message, be forewarned that I am not responsible for any harm you may encounter as a result. See <http://i-want-a-website.com/about-microsoft/twelve-step.html>; for details. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message
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